<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <form action="hello" method="post">
        studentid:<input type="text" name="studentid"><br>
        classid:<input type="text" name="classid"><br>
        <input type="submit" value="提交">
    </form>
    <!-- 这是一个ajax请求 -->
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.4/jquery.min.js"></script>
    <!-- <script>
        $.ajax({
            type:'put',
            url:'hello',
            success:function(body,status){
                console.log(body);
            }
        });
    </script> -->
</body>
</html>